Product details

BNC Straight Receptacle Jack Solder Cup Bulkhead Front Mount 50 Ohm

Name: 031-221-RFX
SKU: 031-221-RFX

China-sourced compatible alternative — fit confirmed by drawing/spec review.

Part number (MPN)

031-221-RFX

Impedance

Frequency

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We coordinate supplier-qualified RF connector and cable assembly sourcing from drawings, samples, or BOM. Typical production lead time is 3–6 weeks after drawing/spec review; feasibility, MOQ, and fit are confirmed by RFQ.

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Lead time: 3–6 wks | MOQ: 200+ pcs

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Specifications

031-221-RFX

Specifications for 031-221-RFX
Interface	Not Applicable
Impedance	50
Frequency (max)	4
Gender	Jack
Orientation	Straight
Termination	Solder
Termination	Solder Cup
Mounting	Bulkhead - Front Mount
Body Material	Zinc Diecast
Termination	Phosphor Bronze
Alias	31-221-RFX B6351B1-ND3G-50
Body Finish	Nickel

Show 14 more specs

Termination	Gold
Coupling mechanism	Bayonet
Export Control Classification Number	EAR99
Extended Dielectric Length	0.205 Inches (5.21 mm)
IP rating	Not Rated
Insulator Material	Delrin
Isolated	No
Low PIM	No
Mil Qualified	Not Mil Qualified
Non Magnetic	No
Ports	1 (Single Port)
Size Category	Miniature
Temp (Max Degrees Celsius)	85
Temp (Min Degrees Celsius)	-40

Description

Current reference data for 031-221-RFX: 50 · 4 · Bulkhead - Front Mount. The catalog currently lists the configuration as: Straight · Solder. Impedance is listed as 50. If that parameter is critical, confirm it again in RFQ. Frequency is listed as 4. The real operating limit still depends on the assembly, mating pair, and application context. Mounting is listed as Bulkhead - Front Mount. If panel, bulkhead, or flange constraints matter, send the dimensions with the RFQ. Material is listed as Zinc Diecast. That is useful for review, but it does not replace full project stack-up confirmation. The catalog also lists a sealing or protection value of Not Rated. Check that against the real environment requirement in RFQ. Use this page to shortlist before RFQ, not as the final sign-off.

Use this page to shortlist before RFQ. MOQ 200+ custom production and supply path are confirmed after drawing/spec/BOM review; no spot stock is assumed.

Request Quote (RFQ)

Cstone is a professional factory—not a trading company—specializing in RF and coaxial connectors, adapters, and cable assemblies, including N-type, BNC, SMA, SMP, SSMB, MMCX, and more. We manufacture custom connectors to 2D drawings or samples; fit, MOQ, lead time, and production details are confirmed by RFQ. Factory-made production to 2D drawings or samples; MOQ 200+ and typical 3–6 week lead time are confirmed after drawing/spec/BOM review. Physical inventory is not promised; production details are confirmed by RFQ.

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Why work with us?

Form-Fit-Function compatibility confirmed by drawing/spec review
Commercially competitive alternative for replacement and sourcing projects
MOQ 200+ and lead time confirmed by model, quantity, and supply path

Working hours: 10:00–20:00 (Beijing Time, UTC+8)

We typically reply within 1 business day (subject to workload and time zones).

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Related RF sourcing routes

If this MPN is only a reference point, continue with a replacement, equivalent, adapter, or drawing-based cable assembly review.

Brand replacement briefs SMA alternatives from China BNC connector equivalents N Type RF replacement Custom RF cable from drawing

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Engineer checklist (key parameters)

Gender Jack

Orientation Straight

Impedance 50

Frequency (max) 4

IP rating Not Rated

Coupling mechanism Bayonet

Mounting Bulkhead - Front Mount

Termination Solder

Low PIM No

If these parameters are critical, include them in the RFQ.

FAQ

What mounting style does 031-221-RFX use?

Our catalog lists the mounting style for 031-221-RFX as: Bulkhead - Front Mount. If you have panel/bulkhead/flange constraints, attach a drawing in the RFQ.

Is this an original part or an alternative/replacement?

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MPN Search Supports exact, prefix, and partial matching. ⌄

Supports exact, prefix, and partial matching.

000-10400 000-1 00010400

Disclaimer

Manufacturer names, trademarks, symbols, and part numbers are used for identification and cross-reference only. Cstone Technology operates its own factory for RF/coaxial connectors, adapters, and cable assemblies and is not a trading company or affiliated with the original brands. Trademarks remain the property of their respective owners. Final suitability is confirmed by drawing/spec review during RFQ.